错误原因：nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
### The error may exist in file [/home/pj_zyl/tomcat/webapps/ROOT/WEB-INF/classes/sqlMapper/archivesMapper.xml]
### The error may involve cn.xinjinjie.zyl_core.dao.ArchivesDao.queryDto
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
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